Cutter for ice-planers



(No Model.)

J N BRIGGS CUTTER FOR ICE PLANERS.

Patentd Mar. 4, 1890..

Wlinesse s:

inventor:

I JOHN N.Bruess, by WJZQ; A L2M,

Ollitorneu UN TED STATES PATENT OFFICE.

JOHN N. BRIGGS, OF COEYMANS, NEW YORK.

CUTTER FOR lCE-PLANERS.

SPECIFICATION forming part of Letters Patent No. 422,566, dated March 4,1890. Applicationfiled December 10, 1886. Serial No.22] ,199- (Nomodel.)

To all whom'it may concern:

Be it known that I, JOHN N. BRIGGS, of Ooeymans, in the county of Albanyand State of New York, have invented new and useful Improvements inCutters for Ice-Planers, of which the following is a specification.

This invention relates to improvements on the cutter-teeth shown andclaimed in Letters Patent No. 346,57 6, granted to me on the 3d day ofAugust, 1886; and the object of this present invention is 'to providecutters having teeth that are in substantiallythe same form as thoseshown in the said patent, but which, instead of being in single chiselswhich are separately removable from the cutterhead, are made in sectionsof two or more teeth, which may be secured to the cutterhead to form acutter of the required width. This object I attain by means of theconstruction illustrated in the accompanying drawings, which are hereinreferred to and form part of this specification, and in which Figure lis a front elevation of a cutterhead with the cutters composed ofsections shown in an inclined position; Fig. 2, a plan of a detachedcutter-plate; Fig. 3, a trans verse section of Fig. 2 at the line w as;Fig. 4, an edge View of the lower edge of Fig. 2; Fig. 5, a frontelevation of a cutter-head provided with a modified form' of my cutters,with the latter shown in an inclined position; Fig. 6, a transversesection of Fig. 1 at the lines 2 z, and Fig. 7 a transverse section of acutter-head in which a continuous plate of cutters connects the twoshoes.

As represented in the drawings, A is the cross-bar of the cutter-head,which cutterhead, as shown in Figs. 1, 5, and 6, consists of saidcross-bar secured to the shoes a, that are adapted to rest upon theinclined stringpieces of an ice-elevator in such manner that saidcutter-head will be immovably held from attaining a sidewise motion, andwhich maintain the cutters at the required angle in respect to theinclination of said elevator.

The cutter B, which is made of plate-steel or other suitable material,has a beveled face 1) formed at the lower part of its under side. Thelower edge of said cutter is serrated to form the pointed teeth I), andeach of said teeth is beveled backward on its upper face to form aV-shaped depression 12 whereby a sharp cutting-edge is produced at eachedge of every tooth, so that a cross-section near the point of eachtooth will present a triangular form, of which the beveled face I) willform the base of the triangle. Said cutters may be secured by bolts 19to the cross-bar of the cutter-head A, and may be made either of acontinuous plate of a length that is equal to the entire width of thecutter, as shown in Fig. 5, or it may be made in sections of two or moreteeth, which are bolted to the cutter-head A, as shown in Fig. 1; but,when preferred, said cutter may be extended in length and bolted at eachend directly to the shoes a, as shown in Fig. 6, and in the latter casethe cross-bar A of the cutter-head may be dispensed with.

When the cutter is made with teeth having the form shown in Figs. 1, 2,3, and 4, and is held in an inclined position, as shown in Figs. 6 and7, cakes of ice forced under said cutter in aline parallel to the lowerflange of the shoes a will have their upper surfaces planed, so as toleave a series of shallow V-shapcd grooves or corrugations that willcorrespond to the outline of the cutting-edges of the teeth of saidcutter, as shown in Fig. 1.

In the modification shown in Fig. 5 the pointed teeth I) are made in theform hereinbefore described; but a straight space or landing b is formedbetween all the adjoining teeth, and when the cutter is in the form lastdescribed the cakes of ice operated upon will have their upper surfacesplaned with shallow V shaped grooves separated by levelfaced surfacesconforming to the out-line of the cutting-edge shown in Fig. 5.

I claim as my invention In an ice-planer, the combination of acutter-head that is held in an immovable position in respect to anysidewise movement and 'a cutter consisting of a metallic plate which hasthe under side of its lower edge beveled upwardly, said lower edge beingprovided with a series of pointed teeth, each having its upper surfacebeveled toward the central line of the tooth, whereby will be formedthat their sharpened points will first enter an angular groove betweenthe adjoining the ice and operate in advance of. the side teeth, a sharpcutting-edge at both sides of cutting-edges, as herein specified.

each tooth, and a sharp triangular point at J OI-IN N. BRIGGS. 5 theentering end of each tooth, said angular Witnesses:

grooves being only carried partially across WM. H. LOW,

said plate, and said teeth being so arranged S. B. BREWER.

